Kernel 5.2.1-1 on AMD hardware - weird graphic glitches

@admdb

Posting output below:

$ inxi -Fxxxz
System: Host: L1LW341 Kernel: 5.1.18-1-MANJARO x86_64 bits: 64 compiler: gcc v: 9.1.0 Desktop: KDE Plasma 5.16.3
tk: Qt 5.13.0 wm: kwin_x11 dm: SDDM Distro: Manjaro Linux
Machine: Type: Laptop System: HP product: HP EliteBook 745 G5 v: N/A serial: Chassis: type: 10 serial:
Mobo: HP model: 83D5 v: KBC Version 08.43.00 serial: UEFI: HP v: Q81 Ver. 01.00.03 date: 04/30/2018
Battery: ID-1: BAT0 charge: 45.0 Wh condition: 45.0/45.0 Wh (100%) volts: 13.1/11.6 model: Hewlett-Packard Primary
type: Li-ion serial: status: Full
CPU: Topology: Quad Core model: AMD Ryzen 5 PRO 2500U w/ Radeon Vega Mobile Gfx bits: 64 type: MT MCP arch: Zen
L2 cache: 2048 KiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm bogomips: 31952
Speed: 1813 MHz min/max: 1600/2000 MHz boost: enabled Core speeds (MHz): 1: 1863 2: 2065 3: 1368 4: 1394 5: 1476
6: 1379 7: 1448 8: 1518
Graphics: Device-1: AMD Raven Ridge [Radeon Vega Series / Radeon Vega Mobile Series] vendor: Hewlett-Packard driver: amdgpu
v: kernel bus ID: 04:00.0 chip ID: 1002:15dd
Display: x11 server: X.Org 1.20.5 driver: amdgpu FAILED: ati unloaded: modesetting alternate: fbdev,vesa
compositor: kwin_x11 resolution: 1920x1080~60Hz, 1920x1080~60Hz
OpenGL: renderer: AMD RAVEN (DRM 3.30.0 5.1.18-1-MANJARO LLVM 8.0.0) v: 4.5 Mesa 19.1.2 direct render: Yes
Audio: Device-1: Advanced Micro Devices [AMD/ATI] Raven/Raven2/Fenghuang HDMI/DP Audio vendor: Hewlett-Packard
driver: snd_hda_intel v: kernel bus ID: 04:00.1 chip ID: 1002:15de
Device-2: Advanced Micro Devices [AMD] Family 17h HD Audio vendor: Hewlett-Packard driver: snd_hda_intel v: kernel
bus ID: 04:00.6 chip ID: 1022:15e3
Device-3: C-Media type: USB driver: cm6533_jd,snd-usb-audio,usbhid bus ID: 2-1.1:7 chip ID: 0d8c:0022
Sound Server: ALSA v: k5.1.18-1-MANJARO
Network: Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: Hewlett-Packard driver: r8168
v: 8.047.02-NAPI port: 3300 bus ID: 01:00.0 chip ID: 10ec:8168
IF: enp1s0f0 state: down mac:
Device-2: Intel Wireless 8265 / 8275 driver: iwlwifi v: kernel port: 3000 bus ID: 02:00.0 chip ID: 8086:24fd
IF: wlp2s0 state: up mac:
Device-3: Realtek RTL8153 Gigabit Ethernet Adapter type: USB driver: r8152 bus ID: 3-1.3:3 chip ID: 0bda:8153
serial:
IF: enp4s0f3u1u3 state: down mac:
Drives: Local Storage: total: 238.47 GiB used: 128.98 GiB (54.1%)
ID-1: /dev/nvme0n1 vendor: Toshiba model: KXG50ZNV256G size: 238.47 GiB speed: 31.6 Gb/s lanes: 4 serial:
rev: AAHA4102 scheme: GPT
Partition: ID-1: / size: 217.54 GiB used: 128.98 GiB (59.3%) fs: ext4 dev: /dev/dm-0
ID-2: swap-1 size: 16.14 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/dm-1
Sensors: System Temperatures: cpu: 40.2 C mobo: 41.0 C gpu: amdgpu temp: 40 C
Fan Speeds (RPM): N/A
Info: Processes: 368 Uptime: 2h 25m Memory: 14.67 GiB used: 3.91 GiB (26.6%) Init: systemd v: 242 Compilers: gcc: 9.1.0
Shell: bash v: 5.0.7 running in: konsole inxi: 3.0.34

Although I'm not sure about the ' ' ' thing, so hoping a blockquote will be fine. As I said - switched back to 5.1.

@Strit
Ok, good to know. I have had issues with this laptop's UEFI during installation at first (approximately a year ago), so I was wondering if it's specific to my hardware model.
Seems like a regression on AMD graphics then?

Just a note @matkuzma, the </> is better for inxi's. :grin:
With the ``` ( it's the key typically under the Esc key ) you have to actually space it right, at least that's my experience.

```
text here
```

Sure, thanks. Will keep that in mind.
Long time user (has it really been over 4 years?), Forum newcomer.

1 Like

@Strit @matkuzma you should both update your BIOS'es :wink:
they are both from early/mid 2018 and there were several firmware updates that require the newest AGESA in BIOS to work correctly.

2 Likes

That's not a bad idea. :slight_smile:

Except that for my specific laptop the newest BIOS is the one I have.

I have to admit I was sceptical to upgrade as when I got this device a year ago it could not boot ANY linux whatsoever on upgraded firmware - had to downgrade it to use anything non-Windows10.

However, it seems you are correct, dear Sir (or Madame).

Will try to post inxi -Fxxxz properly below:

System:    Host: L1LW341 Kernel: 5.2.1-1-MANJARO x86_64 bits: 64 compiler: gcc v: 9.1.0 Desktop: KDE Plasma 5.16.3 
           tk: Qt 5.13.0 wm: kwin_x11 dm: SDDM Distro: Manjaro Linux 
Machine:   Type: Laptop System: HP product: HP EliteBook 745 G5 v: N/A serial: <filter> Chassis: type: 10 serial: <filter> 
           Mobo: HP model: 83D5 v: KBC Version 08.4D.00 serial: <filter> UEFI: HP v: Q81 Ver. 01.07.00 date: 04/15/2019 
Battery:   ID-1: BAT0 charge: 45.3 Wh condition: 45.8/45.8 Wh (100%) volts: 13.2/11.6 model: Hewlett-Packard Primary 
           type: Li-ion serial: <filter> status: Charging 
           Device-1: hidpp_battery_0 model: Logitech Wireless Mouse B330/M330/M331 serial: <filter> 
           charge: 55% (should be ignored) rechargeable: yes status: Discharging 
CPU:       Topology: Quad Core model: AMD Ryzen 5 PRO 2500U w/ Radeon Vega Mobile Gfx bits: 64 type: MT MCP arch: Zen 
           L2 cache: 2048 KiB 
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm bogomips: 31948 
           Speed: 1384 MHz min/max: 1600/2000 MHz boost: enabled Core speeds (MHz): 1: 1371 2: 1443 3: 1368 4: 1381 5: 1498 
           6: 1592 7: 1368 8: 1368 
Graphics:  Device-1: AMD Raven Ridge [Radeon Vega Series / Radeon Vega Mobile Series] vendor: Hewlett-Packard driver: amdgpu 
           v: kernel bus ID: 04:00.0 chip ID: 1002:15dd 
           Display: x11 server: X.Org 1.20.5 driver: amdgpu FAILED: ati unloaded: modesetting alternate: fbdev,vesa 
           compositor: kwin_x11 resolution: 1920x1080~60Hz, 1920x1080~60Hz 
           OpenGL: renderer: AMD RAVEN (DRM 3.32.0 5.2.1-1-MANJARO LLVM 8.0.0) v: 4.5 Mesa 19.1.2 direct render: Yes 
Audio:     Device-1: Advanced Micro Devices [AMD/ATI] Raven/Raven2/Fenghuang HDMI/DP Audio vendor: Hewlett-Packard 
           driver: snd_hda_intel v: kernel bus ID: 04:00.1 chip ID: 1002:15de 
           Device-2: Advanced Micro Devices [AMD] Family 17h HD Audio vendor: Hewlett-Packard driver: snd_hda_intel v: kernel 
           bus ID: 04:00.6 chip ID: 1022:15e3 
           Device-3: C-Media type: USB driver: cm6533_jd,snd-usb-audio,usbhid bus ID: 2-1.1:4 chip ID: 0d8c:0022 
           Sound Server: ALSA v: k5.2.1-1-MANJARO 
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: Hewlett-Packard driver: r8168 
           v: 8.047.02-NAPI port: 3300 bus ID: 01:00.0 chip ID: 10ec:8168 
           IF: enp1s0f0 state: down mac: <filter> 
           Device-2: Intel Wireless 8265 / 8275 driver: iwlwifi v: kernel port: 3000 bus ID: 02:00.0 chip ID: 8086:24fd 
           IF: wlp2s0 state: up mac: <filter> 
           Device-3: Realtek RTL8153 Gigabit Ethernet Adapter type: USB driver: r8152 bus ID: 3-1.3:3 chip ID: 0bda:8153 
           serial: <filter> 
           IF: enp4s0f3u1u3 state: down mac: <filter> 
Drives:    Local Storage: total: 238.47 GiB used: 130.55 GiB (54.7%) 
           ID-1: /dev/nvme0n1 vendor: Toshiba model: KXG50ZNV256G size: 238.47 GiB speed: 31.6 Gb/s lanes: 4 serial: <filter> 
           rev: AAHA4102 scheme: GPT 
Partition: ID-1: / size: 217.54 GiB used: 130.50 GiB (60.0%) fs: ext4 dev: /dev/dm-0 
           ID-2: swap-1 size: 16.14 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/dm-1 
Sensors:   System Temperatures: cpu: 52.5 C mobo: 44.0 C gpu: amdgpu temp: 52 C 
           Fan Speeds (RPM): N/A 
Info:      Processes: 304 Uptime: 3m Memory: 14.67 GiB used: 2.31 GiB (15.7%) Init: systemd v: 242 Compilers: gcc: 9.1.0 
           Shell: bash v: 5.0.7 running in: konsole inxi: 3.0.34 

As of now everything's running smoothly - will report if it goes awry.

that's one of the reasons why I only buy enterprise-aimed notebooks (Lenovo ThinkPad, Dell Latitude, HP Elitebook etc)
Have you tried reflashing that BIOS? I am not sure why they would offer a July 2018 BIOS in February 2019 ....

Edit: @Strit: There is a newer one now: https://pcsupport.lenovo.com/de/de/downloads/DS502075

Nope. That's for the Intel based one I think. :slight_smile:
Read this:
"the preload BIOS version is 6KCN27WW, 6KCN28WW, and 6KCN29WW, please download 6KCN30WW."

PS: I lasted flashed my BIOS when 5.2 released.

I really thought that

720S-13ARR

already defines the AMD one ... not sure why they would use such a long model name and still mix AMD and Intel CPU's in it ...

I don't know, I just remember that the "newer" versions was reported by the tool to not match the laptop model.

Still encountering this problem on a similar laptop as OP (HP 755 G5) with XFCE, even after BIOS update:

screenfetch result:


 ██████████████████  ████████     me@my-pc
 ██████████████████  ████████     OS: Manjaro 18.0.4 Illyria
 ██████████████████  ████████     Kernel: x86_64 Linux 5.2.1-1-MANJARO
 ██████████████████  ████████     Uptime: 8m
 ████████            ████████     Packages: 1319
 ████████  ████████  ████████     Shell: bash 5.0.7
 ████████  ████████  ████████     Resolution: 1920x1080
 ████████  ████████  ████████     DE: Xfce4
 ████████  ████████  ████████     WM: Xfwm4
 ████████  ████████  ████████     WM Theme: Adapta-Nokto-Maia
 ████████  ████████  ████████     GTK Theme: Adapta-Nokto-Eta-Maia [GTK2]
 ████████  ████████  ████████     Icon Theme: Papirus-Dark-Maia
 ████████  ████████  ████████     Font: Noto Sans 10
 ████████  ████████  ████████     CPU: AMD Ryzen 7 PRO 2700U w/ Radeon Vega Mobile Gfx @ 8x 2.2GHz
                                  GPU: AMD RAVEN (DRM 3.32.0, 5.2.1-1-MANJARO, LLVM 8.0.0)
                                  RAM: 2222MiB / 6962MiB

inxi -Fxxxxz result:


System:    Host: my-pc Kernel: 5.2.1-1-MANJARO x86_64 bits: 64 compiler: gcc v: 9.1.0 Desktop: Xfce 4.13.5git-58bf69
           tk: Gtk 3.24.10 info: xfce4-panel wm: xfwm4 dm: LightDM 1.30.0 Distro: Manjaro Linux
Machine:   Type: Laptop System: HP product: HP EliteBook 755 G5 v: N/A serial: <filter> Chassis: type: 10 serial: <filter>
           Mobo: HP model: 83D5 v: KBC Version 08.4D.00 serial: <filter> UEFI: HP v: Q81 Ver. 01.07.00 date: 04/15/2019
Battery:   ID-1: BAT0 charge: 38.8 Wh condition: 56.2/56.2 Wh (100%) volts: 12.3/11.6 model: Hewlett-Packard Primary
           type: Li-ion serial: <filter> status: Charging
CPU:       Topology: Quad Core model: AMD Ryzen 7 PRO 2700U w/ Radeon Vega Mobile Gfx bits: 64 type: MT MCP arch: Zen
           L2 cache: 2048 KiB
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm bogomips: 35148
           Speed: 1371 MHz min/max: 1600/2200 MHz boost: enabled Core speeds (MHz): 1: 1369 2: 1381 3: 1494 4: 1441 5: 1373
           6: 1378 7: 1372 8: 1371
Graphics:  Device-1: AMD Raven Ridge [Radeon Vega Series / Radeon Vega Mobile Series] vendor: Hewlett-Packard driver: amdgpu
           v: kernel bus ID: 04:00.0 chip ID: 1002:15dd
           Display: x11 server: X.Org 1.20.5 driver: amdgpu,ati unloaded: modesetting alternate: fbdev,vesa
           resolution: 1920x1080~60Hz
           OpenGL: renderer: AMD RAVEN (DRM 3.32.0 5.2.1-1-MANJARO LLVM 8.0.0) v: 4.5 Mesa 19.1.2 direct render: Yes
Audio:     Device-1: Advanced Micro Devices [AMD/ATI] Raven/Raven2/Fenghuang HDMI/DP Audio vendor: Hewlett-Packard
           driver: snd_hda_intel v: kernel bus ID: 04:00.1 chip ID: 1002:15de
           Device-2: Advanced Micro Devices [AMD] Family 17h HD Audio vendor: Hewlett-Packard driver: snd_hda_intel v: kernel
           bus ID: 04:00.6 chip ID: 1022:15e3
           Sound Server: ALSA v: k5.2.1-1-MANJARO
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: Hewlett-Packard driver: r8168
           v: 8.047.02-NAPI port: 3300 bus ID: 01:00.0 chip ID: 10ec:8168
           IF: enp1s0f0 state: down mac: <filter>
           Device-2: Intel Wireless 8265 / 8275 driver: iwlwifi v: kernel port: 3000 bus ID: 02:00.0 chip ID: 8086:24fd
           IF: wlp2s0 state: up mac: <filter>
           IF-ID-1: br-39a680cfc7ab state: down mac: <filter>
           IF-ID-2: br-5134d72ffa8f state: up speed: N/A duplex: N/A mac: <filter>
           IF-ID-3: br-5e77e1e7e90f state: up speed: N/A duplex: N/A mac: <filter>
           IF-ID-4: br-6c3361d5f730 state: up speed: N/A duplex: N/A mac: <filter>
           IF-ID-5: br-729e8ade863b state: up speed: N/A duplex: N/A mac: <filter>
           IF-ID-6: br-f01f7e4d9dda state: up speed: N/A duplex: N/A mac: <filter>
           IF-ID-7: docker0 state: down mac: <filter>
           IF-ID-8: veth042b728 state: up speed: 10000 Mbps duplex: full mac: <filter>
           IF-ID-9: veth1e36691 state: up speed: 10000 Mbps duplex: full mac: <filter>
           IF-ID-10: veth8d5ff8a state: up speed: 10000 Mbps duplex: full mac: <filter>
           IF-ID-11: vethb0c7c13 state: up speed: 10000 Mbps duplex: full mac: <filter>
           IF-ID-12: vethe8a6af9 state: up speed: 10000 Mbps duplex: full mac: <filter>
Drives:    Local Storage: total: 238.47 GiB used: 295.25 GiB (123.8%)
           ID-1: /dev/nvme0n1 vendor: Toshiba model: KBG30ZMV256G size: 238.47 GiB speed: 15.8 Gb/s lanes: 2 serial: <filter>
           rev: ADHA0101 scheme: GPT
Partition: ID-1: / size: 233.43 GiB used: 147.61 GiB (63.2%) fs: ext4 dev: /dev/nvme0n1p2
Sensors:   System Temperatures: cpu: 58.1 C mobo: 49.0 C gpu: amdgpu temp: 58 C
           Fan Speeds (RPM): N/A
Info:      Processes: 257 Uptime: 1m Memory: 6.80 GiB used: 1.74 GiB (25.5%) Init: systemd v: 242 Compilers: gcc: 9.1.0
           clang: 8.0.0 Shell: bash v: 5.0.7 running in: server inxi: 3.0.34

It's a shame I can't use this kernel since it has some touch-pad fixes that make it quite usable compared to the sorry state it was before (randomly flicking up while scrolling down and random high speed auto-clicks while rolling a finger from side to side).

I'll try with testing branch as well (right now on stable).

EDIT: testing branch has the same problem.
EDIT 2: Same for kernel 5.3-rc1

Yeah. I've been trying all sort of stuff too.
So far I am stuck on 5.1, which has just been announced EOL. :frowning:

I have been reading threads on the Lenovo support forum all day now. And I can now confirm that my Lenovo model 81BR, with the Ryzen 2700U, will not be getting updates beyond 6KCN30WW.
They way they get around the AMD driver issue in Windows, is by providing an AMD driver package for Windows with updated AMD drivers that work with that BIOS.

Needless to say, that I am going to contact Lenovo and ask what us Linux users are suppose to do. Because staying on 4.19 is not a great option, since most of the AMDGPU stuff for Raven Ridge is not working well there, and 5.1 is now EOL.

There have been posted workaround for my laptop model, but it's "hacking" the BIOS updater to think it's OK to update. So I would rather not go that route.

:wave: Another "Me, too!"

System:    Host: inspirognome Kernel: 5.2.4-1-MANJARO x86_64 bits: 64 compiler: gcc v: 9.1.0 Desktop: Gnome 3.32.2 
           wm: gnome-shell dm: GDM 3.32.0 Distro: Manjaro Linux 
Machine:   Type: Laptop System: Dell product: Inspiron 5575 v: 1.3.2 serial: <filter> Chassis: type: 10 v: 1.3.2 
           serial: <filter> 
           Mobo: Dell model: 0M0Y6P v: X01 serial: <filter> UEFI: Dell v: 1.3.2 date: 05/10/2019 
Battery:   ID-1: BAT1 charge: 39.1 Wh condition: 39.1/42.0 Wh (93%) volts: 13.0/11.4 
           model: SDI 0x4D,0x38,0x34,0x49,0x00,0x00,0x0057 type: Li-ion serial: <filter> status: Full 
           Device-1: hidpp_battery_0 model: Logitech Wireless Mobile Mouse MX Anywhere 2S serial: <filter> 
           charge: 55% (should be ignored) rechargeable: yes status: Discharging 
CPU:       Topology: Quad Core model: AMD Ryzen 5 2500U with Radeon Vega Mobile Gfx bits: 64 type: MT MCP arch: Zen 
           L2 cache: 2048 KiB 
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm bogomips: 31959 
           Speed: 1422 MHz min/max: 1600/2000 MHz boost: enabled Core speeds (MHz): 1: 1437 2: 1470 3: 2689 4: 2788 5: 2547 
           6: 1781 7: 1436 8: 1437 
Graphics:  Device-1: AMD Raven Ridge [Radeon Vega Series / Radeon Vega Mobile Series] vendor: Dell driver: amdgpu v: kernel 
           bus ID: 04:00.0 chip ID: 1002:15dd 
           Display: x11 server: X.Org 1.20.5 driver: ati,radeon unloaded: modesetting alternate: fbdev,vesa 
           compositor: gnome-shell tty: N/A 
           OpenGL: renderer: AMD RAVEN (DRM 3.32.0 5.2.4-1-MANJARO LLVM 8.0.1) v: 4.5 Mesa 19.1.3 direct render: Yes 
Audio:     Device-1: Advanced Micro Devices [AMD/ATI] Raven/Raven2/Fenghuang HDMI/DP Audio vendor: Dell driver: snd_hda_intel 
           v: kernel bus ID: 04:00.1 chip ID: 1002:15de 
           Device-2: Advanced Micro Devices [AMD] Family 17h HD Audio vendor: Dell driver: snd_hda_intel v: kernel 
           bus ID: 04:00.6 chip ID: 1022:15e3 
           Sound Server: ALSA v: k5.2.4-1-MANJARO 
Network:   Device-1: Realtek RTL810xE PCI Express Fast Ethernet vendor: Dell driver: r8169 v: kernel port: 2000 
           bus ID: 02:00.0 chip ID: 10ec:8136 
           IF: eth0 state: down mac: <filter> 
           Device-2: Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter vendor: Dell driver: ath10k_pci v: kernel 
           port: 2000 bus ID: 03:00.0 chip ID: 168c:0042 
           IF: wlan0 state: up mac: <filter> 
           Device-3: Qualcomm Atheros type: USB driver: btusb bus ID: 3-2.4:6 chip ID: 0cf3:e009 
           IF-ID-1: anbox0 state: down mac: <filter> 
           IF-ID-2: Mullvad state: unknown speed: N/A duplex: N/A mac: N/A 
Drives:    Local Storage: total: 1.14 TiB used: 822.37 GiB (70.6%) 
           ID-1: /dev/nvme0n1 vendor: Samsung model: SSD 970 EVO Plus 250GB size: 232.89 GiB speed: 31.6 Gb/s lanes: 4 
           serial: <filter> rev: 1B2QEXM7 scheme: GPT 
           ID-2: /dev/sda vendor: Western Digital model: WD10SPZX-75Z10T2 size: 931.51 GiB speed: 6.0 Gb/s rotation: 5400 rpm 
           serial: <filter> rev: 1A03 scheme: GPT 
Partition: ID-1: / size: 227.94 GiB used: 133.25 GiB (58.5%) fs: ext4 dev: /dev/nvme0n1p2 
Sensors:   System Temperatures: cpu: 66.5 C mobo: N/A gpu: amdgpu temp: 66 C 
           Fan Speeds (RPM): fan-1: 2500 
Info:      Processes: 321 Uptime: 6m Memory: 7.43 GiB used: 3.25 GiB (43.7%) Init: systemd v: 242 Compilers: gcc: 9.1.0 
           clang: 8.0.1 Shell: bash v: 5.0.7 running in: tilix inxi: 3.0.35

Well, at least I'm not the only one. Besides the graphical glitches, after a few minutes my laptop freezes solid. Haven't figured that one out yet.

EDIT: I think I solved both issues using the iommu-pt kernel parameter as suggested here:
Bug 111122 - 2500U: Graphics corruption on kernel 5.2

1 Like

Thanks. I will try this one. Mine also freezes after a few minutes. :slight_smile:
It seems to do the job for me as well.
Thanks for the tip!

With iommu=pt on kernel 5.2.4 I get constant black screen when logging in. I guess I'll keep an eye out on that bug report for a proper fix in the kernel :sob: .

same problem on dell 7375 with latest bios

Which problem is that? Two were mentioned. Did you try using the kernel parameter as a workaround?

I discovered I no longer need the iommu=pt kernel parameter after today's testing update with kernel 5.2.14-1.

1 Like

I was not so lucky. The only way I can use 5.2 or 5.3 right now is with export AMD_DEBUG=nodcc in /etc/profile.d/amd_fix.sh. And going back before 5.2 is not an option because the touchpad was fixed in 5.2.

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